anyway I want to use the bottles for my flavored oils but dont want the label which is painted on. and I tried some industrial paint remover and let it sit for the recommended 10 min but it did nothing at all. I might leave it overnight but I figured I would post and see if any dopers had the same problem.
I’d suspect it’s not paint as such, but some kind of thermoplastic or enamel bonded to the glass. So paint remover is unlikely to work, as you found. I think you can buy paint remover specifically for enamel, which might work. If it is a plastic material, petrol (gasoline) might do the job, but I wouldn’t hold out much hope…
If it’s a vinyl or enamal paint I’d be worried the the heat would either make it melt or burn it. Either of which might make it harder to remove. Another option could be to try sand paper, or at least scuffing it with sand paper and then trying the paint remover (naptha, WD-40, gasoline etc…)
:“Goof-Off” removes a wide range of coatings, is non-toxic (smell overpoweringly sweet, thouth), and avail. in small bottles (see top shelf) in HOme Defot (shuddddeeerrr)